Sewing-machine



(No Model.) BVSheets-Sheet 1.

' F. W. osTRoM. SEWING MACHINE.

No. 439,680. Patented Nov. '4, 1890a IIIIINI illlllmllllA llll (No Model.) 3 Sheets-Sheet 2.

I'. W. OSTROM.

SEWING MACHINE.

No. 439,680. y Patented Nov. 4, 18901 (No Model.) 3 Sheets-#Sheet 3.

I'. W. OSTROM.

. ASEWING MACHINE. No. 439,680. Patented Nov. 4, 1890n wrbrwe. Y ,2511/6706074 Mamba/w AUNITED .STATES PATENT OFFICE.

FREELAND WV. OSTROM, OF BRIDGEPORT, CONNECTICUT.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. L139,680, dated November 4, 1890. Application filed August 28, 1899. Serial No. 363.279. (No model.)

To a/ZZ whom, it may concern:

Be it known thatl, FREELAND W. OsTRoM, of Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Sewing-Machines, of Which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention is an improvement on that described in an application, Serial No. 250,803, the object of my invention being to simplify the construction and reduce the number of the parts. In the invention described in the said application the cutter-actuating rockshaft derives its movement to give the cuttercarrying bar a single thrust for each buttonhole by or through a cast-off cam on the main shaft of the machine below the bed-plate; but in this my present invention I have provided the rocking shaft which actuates the needlebar With a pin or projection, and the cutteractuating rock-shaft parallel to the said needle-bar-aotuating shaft is provided With a latch, Which is held out of engagement With the said projection when the cutter-bar is in its normal position of rest; but When the button-hole is to be cut in the clothheld in the clamp under the` needle the said cutter-baractuating rock-shaft is rocked sufficiently to place the said latch in the path of movement of, and to be engaged by, the projection on the needle-bar-actuating rock-shaft, and the latter turns the cutter-bar-actuating rock-shaft and makes one depression or thrust of the cutter-bar and cutter. Vhile the cutter-baractuating rock-shaft is moving to throw the cutter-carrying bar down, a cam on the said rock-shaft acts to depress on an oscillating spring-supported lever having an arm, thus disengaging it from a projection carried by the cloth-clamp-actuating disk or wheel, which projection at the proper time is acted upon to turn the said lever and start in operation the cutting mechanism.v

Prior to my invention I am aware that a needle-bar-actuatingrock-shaft has been connected with and adapted to impart a rocking motion to a cutter-bar-actuating shaft parallel to it by connections between said shafts, one being in the shape of a ratchet-toothed hub, and the other a ratchet-toothed arm, as in application Serial No. 202,742, filed May 20, 1886; but in this present invention the clutch-box of the said application is dispensed with, and in its place I employ a latch, to be described, Which, after the cutter-bar-actuating rock-shaft has had given to it an initial movement by the oscillating lever herein described, causes said latch to engage a pin or projection carried by the needle-bar-actuating rock-shaft.

One part of myinvention consists in a but-` ton-hole sewing-machine containing the following instrumentalities-viz., stitch-forming mechanism, including a rock-shaft for actuating the needle-bar and provided with a pin or projection, a Work-clamp, operating devices for the latter, an independent cutterbar near the needle-bar, a cutter, an independent cutter-bar-actuating rock-shaft also located above the bed-plate, the said cutterbar-actuating rock-shaft being provided With a latch, a stop, and a cam, an oscillating lever, and means between it and the operating devices for the work-clamp to oscillate the said lever and partially turn the cutter-baractuating rock-shaft in one direction and effect the engagement of its latch with the moving projection carried by the needle-baractuat-ing rock-shaft to effect the descent of the cutter-bar, the stop effecting the disengagement of the said latch from the said projection during the reverse movement of the cutter-bar-actuating rock-shaft, as will be described.

My invention also consists in an independent cutter-bar located at one side of the needle-bar, a cutter carried by the said cutterbar, a cutter-bar-actuatin g rock-shaft located above the bed-plate, a latch carried by said cutter-bar-actuating rock-shaft, and a stop co-operating therewith,combined with a needle-bar-actuating rock-shaft having a projection which is engaged at the proper time by the said latch, the said stop acting at a defined period during the reverse movements of the said rock-shafts to lift the said latch from engagement with the said projection, thus leaving the cutter-actuating rock-shaft free from the control of the needle-bar-actuating rock-shaft, substantially as Will be described.

Other features of my invention will be hereinafter described and set forth in thc claims.

Figure l is a rear side elevation of a bnt tonholestitching machine Vembodying my invention; Fig. 2, a detail partial plan view of the bed-plate, the cloth-clamp-actuating devices, the vertical oscillating lever, and parts of the needle and cutter-bar-actuating rock shafts; and Fig. 3, an enlarged partial section to the right of the dotted line fc', Fig. l.

The bed-plate A, the guides or ways a, cloth-clamp T U to hold the material under the needle-bar in position to be stitched and cut, the cloth-clampactuatin g mechanism, including a heart cam disk or plate, as E, a cam-slide M, and a feed wheel or disk F, the lever II I-I, the main under shat't S, the link W, actuated b v the lever I-I H to rotate the feeding-disk step by step, are all substantially as in United States Patent No. 303,557, to which reference may be had.

The cam-hub B on the shaft S, the take-up R, actuated by it, the link B', actuated by an eccentric at one side of the said cam-hub, the needle-baiactuating rock-shaft B2, its crank B3, and link B4 to actuate the needlebar B5, (partially shown in Fig. 1,) are and may be all as common to the lVheeler & lVilson machine.

The cutter a is attached to a cutter-bar adapted to slide in bearings in the head of the machine near or parallel to the needlebar. The cutter-bar has a collar a2, provided with a backwardly and downwardly extended guiding-finger and stud lO, which is embraced by the slotted end of the arm b, fast on the cutter-bar-actuating rock-shaft b', which is parallel to the shaft B2 and above the bed-plate, the said shaft having a cam n and a collar n', provided with a finger nx.

The stud m is erected above the center of motion of the lever H I'I and receives on it the oscillating lever m', having arms m5 and m7, and a projection m10 and a spiral spring m2, fast at one end to a collar 2() and at its upper end to the lever m', and the arm 'm6, attached to the cloth clamp-actuating-disk or wheel are or may be allsubstantially as in my application, Serial No. 250,803, where the said parts are more fully described.

The cutter-bar-actuating rock-shaft b has fast on it a collar r, on which at r is pivoted a latch r2, shown as acted upon by a spring r3, which acts to normally keep the said latch pressed against a stop 22, herein shown as forming part of the collar r. The spring T5 on the cutter-bar acts upwardly against the knob r6 and lifts the cutter-bar, causing it by its collar a2 to turn the rock-shaft b and normally keep the finger n against the arm m7 of the lever m', thus keeping the latch in the position Fig. 3. l

The spring m2 acts normally to keep the pin 6 of the arm mT against the stop m4 or upper bearing for the stud m and to keep the arm m5 pressed toward the rear of the machine and up in the line of movement of the pin 24., carried by the arm m6, so that as the said pin in the rotation of the clothclamp-actuating disk or wheel strikes the said arm, which it does, as herein provided for, just as the cutter-bar is to be actuated for one thrust, and only one thrust, to cut the button-hole, preferably just after the stitching of two sides and one end has been completed, the said lever m is turned, which causes the rock-shaft b' to be turned in the direction oi' the arrow thereon, Fig. 3, which places the notched part of the latch in the range of movement of the pin or projection 25 of a collar 2G, attached to the needle-bai actuating rock-shaft, so that said projection catches the said latch and completes the movement of the rock-shaft started by the lever m', acting on the finger ax, and causes the cutter-bar to be thrown quickly down to make a cut in the cloth held by the clamp. As the cutter-actuating rock-shaft b is so turned to depress the cutter-bar to cut the material, the cam a, acting on the upper end of the lever m', depresses the same, the spring m2 yielding until the arm m5 passes below the pin 24 and releases arm m5, so that the spring m2 by its expansion throws the arm horizon tally back into the position from which it was moved by the projection 24, and said arm m5 cannot be again engaged to operate the cutter until after another rotation of the cloth-clampactuating disk. The release of the arm m5 leaves the spring T5 free to lift the cuttenbar and turn the rock-shaft b into its normal position with the latch thrown out of the range of movement of the projection 25.

By the reverse movement of the rockshafts I mean that movement of the needlebar-actuating rock-shatt which takes place while the needle-bar is being elevated and that movement of the cutter-bar-actuating rockshaft which takes place when the cutter-bar is rising.

I have described thc spring T5 as employed to restore the rock-shaft b' to its normal position or to reverse its movement, and for this purpose I prefer to use some form of spring; but this invention is not intended to be limited to the exact location or construction of the said spring, and, in fact, such spring might be altogether dispensed with, for while the projection 25 is moved on its backward stroke and the needle-bar is rising said projection will meet the shoulder 30 of the latch and reverse the movement of the rock-shaft b or return it into its normal position.

In the operation of my improved machine it will be seen that the latch r2 is really disengaged from the projection 25 by the stop 22, which abuts against the said latch as the rock-shaft b is being reversed or turned back into its normal position, the said stop contactin g with the said latch at a predetermined point in the oscillation of the two parallel rock-shafts, the said stop acting to swing the latch about a center coincident with the cen ter of the rock-shaft b instead of drawing the said latch longitudinally, as when the pin r alone acts to move the latch. This posi- IOO TIO

pin or projection, a work-clamp, operating de- Vices for the latter, an independent cutterbar near the needle-bar, a cutter, an independent cutter-bar-actuating rock-shaft, also located above the bed-plate, the said cutterbar-actuating rock-shaft being provided with a latch, a stop, and a cam, an oscillating lever, and means between it and the operating devices for the work-clamp to oscillate the said lever and partially turn the cutter-bar-actuating rock-shaft in one direction and effect the engagement of its latch with the moving projection carried by the needle-bar-actuating rock-shaft to eiect the descent of the cutterbar, the stop effectingthe disengagement of the said latch from the said projection during the reverse movement of the cutter-bar-actuating rock-shaft, substantially as described.

2. An independentcutter-bar located at one side of the needle-bar, a cutter carried by the said cutter-bar, a cutter-bar-actuating roekshaft located above the bed-plate, a latch carried by said cutter-bar-actuating rock-shaft and a stop co-operating therewith, combined with a needle-baractuating rock-shaft having a projection which is engaged at the proper time by the said latch, the said stop acting` at a defined period during the reverse movements of the said rock-shafts to lift the said latch from engagement with the said proj ection, thus leavin gthe cutter-actuatin greekshaft free from the control of the needle-baractuating rock-shaft, substantially as described.

3. The rock-shaft B2, having a collar and projection 25, means to actuate the rock-shaft, a rock-shaf t b', parallel therewith and provided with a collar and a stop 22, a cutter-carrying bar, means to connect it operatively with said shaft b', and a pivoted latch normally held out from engagement with the moving proj ection 25, combined with means to give t0 the rock-shaft an initial movement to cause the said latch to engage the said projection and thereby cause the rock-shaft B2 to move the rock-shaft b for part of a stroke in one direction and partially backward in the opposite direction, the stop 22 acting during the said backward movement of the rock-shaft b to disengage the said latch from the said projection, as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREELAND W. OSTROM.

Witnesses:

GEO. W. GREGORY, A. S. WIEGAND. 

